3159ba5cbded77d91170b5cb834eab2c900f1e04
[lttng-tools.git] / lttng-sessiond / ust-app.h
1 /*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
7 * of the License.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17 */
18
19 #ifndef _LTT_UST_APP_H
20 #define _LTT_UST_APP_H
21
22 #include <stdint.h>
23 #include <urcu/list.h>
24
25 #include "trace-ust.h"
26
27 #define UST_APP_EVENT_LIST_SIZE 32
28
29 extern int ust_consumer_fd;
30
31 /*
32 * Application registration data structure.
33 */
34 struct ust_register_msg {
35 uint32_t major;
36 uint32_t minor;
37 pid_t pid;
38 pid_t ppid;
39 uid_t uid;
40 gid_t gid;
41 char name[16];
42 };
43
44 /*
45 * Global applications HT used by the session daemon.
46 */
47 struct cds_lfht *ust_app_ht;
48
49 struct cds_lfht *ust_app_sock_key_map;
50
51 struct ust_app_key {
52 pid_t pid;
53 int sock;
54 struct cds_lfht_node node;
55 };
56
57 struct ust_app_event {
58 int enabled;
59 int handle;
60 struct lttng_ust_object_data *obj;
61 struct lttng_ust_event attr;
62 char name[LTTNG_UST_SYM_NAME_LEN];
63 struct cds_lfht *ctx;
64 struct cds_lfht_node node;
65 };
66
67 struct ust_app_channel {
68 int enabled;
69 int handle;
70 char name[LTTNG_UST_SYM_NAME_LEN];
71 struct lttng_ust_channel attr;
72 struct lttng_ust_object_data *obj;
73 struct ltt_ust_stream_list streams;
74 struct cds_lfht *ctx;
75 struct cds_lfht *events;
76 struct cds_lfht_node node;
77 };
78
79 struct ust_app_session {
80 int enabled;
81 /* started: has the session been in started state at any time ? */
82 int started; /* allows detection of start vs restart. */
83 int handle; /* Used has unique identifier */
84 unsigned int uid;
85 struct ltt_ust_metadata *metadata;
86 struct lttng_ust_object_data *obj;
87 struct cds_lfht *channels; /* Registered channels */
88 struct cds_lfht_node node;
89 char path[PATH_MAX];
90 };
91
92 /*
93 * Registered traceable applications. Libust registers to the session daemon
94 * and a linked list is kept of all running traceable app.
95 */
96 struct ust_app {
97 pid_t ppid;
98 uid_t uid; /* User ID that owns the apps */
99 gid_t gid; /* Group ID that owns the apps */
100 uint32_t v_major; /* Verion major number */
101 uint32_t v_minor; /* Verion minor number */
102 char name[17]; /* Process name (short) */
103 struct cds_lfht *sessions;
104 struct cds_lfht_node node;
105 struct ust_app_key key;
106 };
107
108 #ifdef HAVE_LIBLTTNG_UST_CTL
109
110 int ust_app_register(struct ust_register_msg *msg, int sock);
111 void ust_app_unregister(int sock);
112 int ust_app_create_channel_all(struct ltt_ust_session *usess,
113 struct ltt_ust_channel *uchan);
114 int ust_app_create_event_all(struct ltt_ust_session *usess,
115 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
116 unsigned long ust_app_list_count(void);
117 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
118 int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
119 int ust_app_start_trace_all(struct ltt_ust_session *usess);
120 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
121 int ust_app_list_events(struct lttng_event **events);
122 void ust_app_global_update(struct ltt_ust_session *usess, int sock);
123
124 void ust_app_clean_list(void);
125 void ust_app_ht_alloc(void);
126 struct cds_lfht *ust_app_get_ht(void);
127 struct ust_app *ust_app_find_by_pid(pid_t pid);
128
129 #else /* HAVE_LIBLTTNG_UST_CTL */
130
131 static inline
132 int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
133 {
134 return 0;
135 }
136 static inline
137 int ust_app_start_trace_all(struct ltt_ust_session *usess)
138 {
139 return 0;
140 }
141 static inline
142 int ust_app_list_events(struct lttng_event **events)
143 {
144 return 0;
145 }
146 static inline
147 int ust_app_register(struct ust_register_msg *msg, int sock)
148 {
149 return -ENOSYS;
150 }
151 static inline
152 void ust_app_unregister(int sock)
153 {
154 }
155 static inline
156 unsigned int ust_app_list_count(void)
157 {
158 return 0;
159 }
160 static inline
161 void ust_app_lock_list(void)
162 {
163 }
164 static inline
165 void ust_app_unlock_list(void)
166 {
167 }
168 static inline
169 void ust_app_clean_list(void)
170 {
171 }
172 static inline
173 struct ust_app_list *ust_app_get_list(void)
174 {
175 return NULL;
176 }
177 static inline
178 struct ust_app *ust_app_get_by_pid(pid_t pid)
179 {
180 return NULL;
181 }
182 static inline
183 int ust_app_add_channel_all(struct ltt_ust_session *usess,
184 struct ltt_ust_channel *uchan)
185 {
186 return 0;
187 }
188 static inline
189 int ust_app_add_event_all(struct ltt_ust_session *usess,
190 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
191 {
192 return 0;
193 }
194 static inline
195 struct cds_lfht *ust_app_get_ht(void)
196 {
197 return NULL;
198 }
199 static inline
200 void ust_app_ht_alloc(void)
201 {
202 }
203 static inline
204 void ust_app_global_update(struct ltt_ust_session *usess, int sock)
205 {
206 }
207
208 #endif /* HAVE_LIBLTTNG_UST_CTL */
209
210 #endif /* _LTT_UST_APP_H */
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